## deriveP

Derivative of matrix V.

Derivative of matrix V.

dV = deriveP(V, supc)

dV = deriveP(V, supc) returns the matrix containg all derivatives of V=orth2powmatrix matrix. dV is required when polyval is choosen instead of orthoval. Remark: always use orthoval instead of polyval.

orth2powmatrix = matrix such that XV = P (double matrix). supc = suplementary conditions (double matrix or cell of strings).

dV = block matrix [n x n x k], where each n = 1, ..., k contains the derivatives (double matrix).